Improved out-coupling efficiency from a green microcavity OLED with a narrow band emission source

Tyler Fleetham, Jeremy Ecton, Guijie Li, Jian Li

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A highly efficient green microcavity organic light emitting diode was developed using a tetradentate cyclometalated platinum complex, PtN1N, with an intrinsically narrow emission spectral band (FWHM = 18 nm). Devices employing the narrow band emitter in MOLEDs consisting of a single pair of a high index dielectric, Ta2O5, and low index dielectric, SiO2, exhibited a high peak external quantum efficiency of 33.7% compared to a standard OLED in the same device architecture with a peak external quantum efficiency of 25.6%. We have also found in our study that narrow band emission sources in tuned microcavity OLEDs exhibit larger enhancements in light out-coupling efficiency accompanied by small changes in color with respect to viewing angle compared to broad band emitters which is advantageous in display applications.

Original languageEnglish (US)
Pages (from-to)141-147
Number of pages7
JournalOrganic Electronics
Volume37
DOIs
StatePublished - Oct 1 2016

Keywords

  • Light extraction
  • Microcavity
  • Narrow spectral emission band
  • Platinum complexes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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